JPH1132165A - Film carrying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide sufficient film carrying force while preventing the damage to a film without supplying strong press-contacting force or unreasonable bending by enlarging the winding angle of the film to a capstan. SOLUTION: With a film cartridge 12 as a base point, the capstan 28 is arranged so as to make the rotation center 28A of the capstan 28 be more distant than the rotation center 16A of a winding reel 16. The film sent out from the film cartridge 12 is engaged so as to be wound to the peripheral surface of the capstan 28, a film track is bent by the capstan 28 and it reaches the winding reel 16. Thus, the winding angle of the film to the capstan 28 is enlarged without adding a special member and the sufficient carrying force is obtained even when the press-contacting force of a pinch roller 30 is relatively small.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film transport apparatus, and more particularly, to a film scanner in which a frame image is read by a line sensor while a developed photographic film housed in a film cartridge is sent out from the film cartridge. A film transport device.

[0002]

2. Description of the Related Art In recent years, a film for a new photographic system in which a photographic film is entirely stored in a film cartridge has been proposed, and a camera and a film scanner using such a film cartridge have been proposed (Japanese Patent Laid-Open No. 8-6).
No. 9026). A film transport device applied to this type of camera or film scanner has a capstan and a pinch roller disposed in a space between a film cartridge and a take-up reel, and a substantially straight line extending from the film cartridge to the take-up reel. The film was being transported along the route.

[0003]

However, the conventional film transfer apparatus has a drawback that a sufficient transfer force cannot be obtained unless the pressing force of the pinch roller is increased, resulting in a large energy loss. There is also known a method in which a film is pressed against a capstan roller by two pinch rollers arranged at a predetermined interval to increase a winding angle around the capstan roller to increase a conveying force (a so-called double pinch roller). However, such a method has a problem that the film is easily bent and the film is easily damaged.

[0004] The present invention has been made in view of such circumstances, and when transporting a film by the driving force of the capstan, the film is not given a strong crimping force or excessive bending, and is prevented from being damaged. It is an object of the present invention to provide a film transport device capable of obtaining a sufficient film transport force.

[0005]

According to the present invention, in order to achieve the above object, there is provided a film supply unit in which a film cartridge is loaded and a film supplied from the film cartridge loaded in the film supply unit. In a film transport device, comprising: a take-up reel; and a capstan driven by a driving force of a motor, and nipping the film together with a pinch roller and transporting the film in a feed direction or a rewind direction. The rotation center of the capstan is located farther from the film supply unit than the rotation center of the take-up reel so as to increase the winding angle.

According to the present invention, the film sent from the film cartridge loaded in the film supply unit is wound on a take-up reel via a capstan. At this time, the rotation center of the capstan is provided farther than the rotation center of the take-up reel with the film cartridge as a base point, so that the film sent from the film cartridge is wound around the peripheral surface of the capstan. And the film track is bent by the capstan to reach the take-up reel.

[0007] This makes it possible to increase the wrapping angle of the film around the capstan without adding any special member, and even if the pressing force of the pinch roller is relatively small,
A sufficient conveying force can be obtained. Therefore, the size of the apparatus is not increased, and power saving can be achieved. Further, since the film path can be formed in the same direction as the curl of the film without giving excessive bending to the film, there is an advantage that the film is less damaged.

According to another aspect of the present invention, there is provided a film transport apparatus having a magnetic head acting on a magnetic recording layer of a film, wherein the magnetic head is disposed between a film supply unit and a capstan. The center of rotation of the stan is located closer to the magnetic head than the film contact surface of the magnetic head. As a result, the film sent from the film cartridge reaches the capstan so that the film is wound around the magnetic head, and the winding angle of the film around the magnetic head can be increased. Therefore, the magnetic head reliably acts on the magnetic recording layer of the film, and errors in reading or writing magnetic information can be prevented.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a film transport device according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 shows an example in which the film transport device according to the present invention is applied to a film scanner. The film scanner 10 mainly includes a film cartridge 12
The film supply unit 14 into which the film is loaded, the film take-up unit 18 including the take-up reel 16, and a film guide unit for guiding a photographic film 44 (not shown in FIG. 1) between the film supply unit 14 and the film take-up unit 18. 20, an illumination lamp 22, an imaging optical system 24, a magnetic recording / reproducing unit 26, and the like.

A capstan 28 is disposed at the upper left of the take-up reel 16 in the drawing, and the photographic film 44 is engaged with the capstan 28 so as to wind around the capstan 28. Then, the film transport path is bent by the capstan 28, and the photographic film 44 is guided to the take-up reel 16. A pinch roller 30 is provided facing the capstan 28, and the pinch roller 3
Numeral 0 is supported by the tip of the lever member 32. The lever member 32 can swing about a shaft 34, and is urged by a spring 36 in a direction in which the pinch roller 30 comes into contact with the capstan 28. A cam follower 38 is provided at the other end of the lever member 32. The cam follower 38 is engaged with a cam (not shown) driven by a driving force of a mode motor 72 described later.

With this mechanism, the driving force of the mode motor 72 is transmitted to the cam, and the cam follower 38 that follows the cam causes the lever member 32 to swing. By the swing of the lever member 32, the pinch roller 30 is pressed and retracted. When the film is transported, the pinch roller 30 is pressed against the capstan 28 so that
When the main power is turned off by ejecting the film cartridge 12 by driving and transporting the film cartridge 4, the press-fit of the pinch roller 30 is released to prevent the capstan 28 from being deformed.

Reference numerals 40 and 41 in the drawing denote film pressing rollers, which are attached in the radial direction of the take-up reel 16 so as to press the photographic film 44 sent from the capstan 28 against the peripheral surface of the take-up reel 16. It is being rushed. The developed photographic film 44 used in the film scanner 10 has a perforation 44A per frame as shown in FIG. 2, for example, and is completely contained in the film cartridge 12 having a single spool 12A. It can be wound up. A light-shielding door (light lock door) (not shown) is provided at the film outlet of the film cartridge 12 so as to be openable and closable.
Driver).

A thin (transparent) magnetic recording layer is coated on the entire surface of the photographic film 44, and a magnetic recording area 45 for recording magnetic information corresponding to each frame is defined on the edge of the photographic film 44. I have. The information recorded in the magnetic recording area 45 includes, for example, a photographing date / time, exposure control data, a print format indicating one of a high-definition image, a panoramic image, and a standard image, and the like.
Various kinds of information are recorded as magnetic information by a camera. The film scanner 10 records print order information (printed frames, number of prints, trimming information, etc.), film automatic reproduction information, and the like as magnetic information.

The magnetic recording areas 45A, 45A provided in the leader portion on the film tip side of the first frame are referred to as leader tracks, and mainly information on the entire film is recorded, and the information is used in a laboratory. FIG.
The illumination lamp 22 is disposed so that its longitudinal direction is orthogonal to the transport direction of the film, so that it can be illuminated over the entire width of the photographic film 44. Rollers 47 and 48 are provided before and after the illumination lamp 22 to prevent the film from being damaged by friction during the film transport, and to curl the photographic film 44 by bending the photographic film 44. The film surface of the reading portion is made flat.

The imaging optical system 24 includes a mirror 50, a lens 5
2 and a CCD line sensor 54, and the transmitted light transmitted through the photographic film 44 is imaged on the light receiving surface of the CCD line sensor 54 via the lens 52. The image light formed on the light receiving surface of the CCD line sensor 54 is R, G,
Charges are accumulated in each sensor provided with a B filter, and are converted into R, G, and B signal charges in an amount corresponding to the intensity of light.
Thereafter, through known signal processing means, for example, NTSC
It is converted by a composite video signal of the system and output to a television monitor (not shown). Thus, the photo film 44
Can be viewed on a television monitor.

The magnetic recording / reproducing section 26 has a reproducing head 56 and a recording head 58, and rollers 60 and 62 are provided at positions facing the respective heads. Playback head 56
The recording head 58 and the recording head 58 are both supported by a holding member 64.
It is arranged in a character shape. The holding member 64 is supported rotatably about a shaft 66, and is rotated by a driving force of a mode motor 72 transmitted by a driving mechanism (not shown). By this rotation operation, a recording state in which the recording head 58 acts on the magnetic recording area 45 of the photographic film 44, and the reproducing head 56 is moved to the magnetic recording area 45.
And the retracted state in which both the recording head 58 and the reproducing head 56 are retracted from the magnetic recording layer of the photographic film 44.

Reference numeral 65 designates an edge regulating member which is in sliding contact with the end face (edge) of the photographic film 44. When recording and reproducing magnetic information, the edge regulating member 65 regulates the position of the film edge to meander the film. Thus, the reproducing head 56 and the recording head 58 are reliably brought into contact with the magnetic recording area 45. Rollers 6 disposed opposite to the reproducing head 56 and the recording head 58, respectively.
The rollers 0 and 62 are provided orthogonal to the film transport direction (parallel to the width direction of the film), and the rollers 60 and 62 are rotatably supported by a common support frame 68. Roller 6
Column-shaped bosses 68a, 68a are formed on both sides of the support frame 68 holding the 0, 62, and these bosses 68a, 68a are formed.
Are supported by bearings (not shown). Thereby, each roller 6 is pressed by the pressing force of the recording head 58 and the reproducing head 56.
The contact surfaces 0 and 62 follow the head surface.
Note that a pad may be used instead of the rollers 60 and 62.

The film scanner 10 transports all frames of the film in the forward direction during film loading, reads magnetic information from the magnetic recording area 45 of the photographic film 44 via the reproducing head 56, and reads the magnetic information. If there is a change in the
At the time of ejecting, the film for all frames is transported in the reverse direction, and magnetic information is overwritten on the magnetic recording area 45 via the recording head 58.

When reading the magnetic information recorded in the magnetic recording area 45 of the photographic film 44 by the reproducing head 46, it is necessary to keep the film transport speed constant.
Magnetic recording area 4 corresponding to the first frame of photographic film 44
5, when the reproducing head 56 operates, the photographic film 4
4 is required to be engaged with the capstan 28 so that the photographic film 44 is transported at a constant speed by the driving force of the capstan 28. From such a request, the positional relationship (arrangement interval) between the reproducing head 56 and the capstan 28 is determined.

In FIG. 1, the rotation center 28A of the capstan 28 is located at a position above the film contact surfaces of the reproducing head 56 and the recording head 58 by a distance d (see FIG. 4). The photographic film 44 sent from the cartridge 12 passes through the recording head 58,
The film is conveyed toward the capstan 28 along a film orbit inclined in the upper left direction in FIG. By forming such a film trajectory, the winding angle of the film around the recording head 58 and the reproducing head 56 is increased, thereby preventing an error during recording and reproduction.

FIG. 3 shows the film scanner 1 shown in FIG.
FIG. 2 is a schematic plan view of the film transport device incorporated in the film transport device. The film transport device mainly includes a film supply unit 14 into which the film cartridge 12 is loaded, a take-up reel 16 for taking up the photo film 44 supplied from the film supply unit 14, the film supply unit 14, and the take-up reel 16. It comprises a film guide section 20 for guiding the photographic film 44 therebetween, the capstan 28 and the pinch roller 30 described in FIG. 1, a film drive motor 70, a mode motor 72, a gear box 74 and the like.

The rotational driving force of the film driving motor 70 is
The spool gear 7 fitted to the take-up reel 16, the capstan 28, and the spool 12A of the film cartridge 12 via a gear train (not shown) stored in the gear box 74.
5 respectively. On the other hand, the mode motor 72
In addition to providing the driving force for pressing / retracting the pinch roller 30 as described above, switching of the power transmission path of a gear train in the gear box 74, and pressing / pressing of the recording head 58 and the reproducing head 56, which are not shown in detail, are performed. It provides a driving force for evacuation, opening and closing of a light shielding door of the film cartridge 12, and the like.

In the film transport path, the recording head 58
A reflection type photo sensor 76 for detecting the perforation 44A is provided in a section between the read head 56 and the read head 56. Recording and reproduction timing of magnetic information is controlled based on the detection of the reflection type photo sensor 76. . In the figure, reference numeral 77 denotes a reflection type photo sensor for detecting the perforation 44A, and the timing of image reading by the CCD line sensor 14 is controlled based on the detection of the sensor.

Next, the operation of the thus configured film transport apparatus will be described with reference to FIG. After the film cartridge 12 is loaded in the film supply section 14, the film drive motor 70 is driven to rotate the spool 12A and the capstan 28 of the film cartridge 12 in the counterclockwise direction in FIG. When the spool 12A of the film cartridge 12 rotates in the counterclockwise rotation direction, a phenomenon of loosening occurs in the film cartridge 12, and the photographic film 44 is sent out from the film cartridge 12.

The photographic film 44 delivered from the film cartridge 12 has its rollers curled by the steps of the rollers 47 and 48, and the flatness of the image reading section illuminated by the illumination lamp 22 is ensured. ing. Photo film 4 is driven by the driving force of spool 12A.
4 is fed out, and when the leading end of the photo film 44 reaches the capstan 28, the photo film 44 is nipped by the capstan 28 and the pinch roller 30. Thereafter, the main body of the film transport is transferred to the capstan 28 and the pinch roller 30. The photo film 44 is engaged with the capstan 28 so as to wind around the peripheral surface of the capstan 28, and the film track is bent downward in FIG. 4 by the capstan 28 and guided to the take-up reel 16.

The photographic film 44 that has passed through the capstan 28 is guided by the film pressing rollers 40 and 41 and reaches the peripheral surface of the take-up reel 16, and is brought into contact with the peripheral surface of the take-up reel 16 by the film pressing rollers 40 and 41. It is pressed down (see FIG. 1). Then, when the take-up reel 16 is driven in the counterclockwise rotation direction in FIG. 3, the photographic film 44 is taken up by the take-up reel 16 by a frictional force with the take-up reel 16.

Thereafter, the driving force transmitted to the spool 12A of the film cartridge 12 is cut off, and the photographic film 44 is wound around the take-up reel 16 by the conveying force of the capstan 28 and the rotational force of the take-up reel 16.
Thus, the photographic film 44 becomes the film cartridge 12.
To the take-up reel 16 (in the forward direction).

At the time of film rewinding, the photographic film 44 is moved from the take-up reel 16 toward the film cartridge 12 by rotating the spool 12A and the capstan 28 of the film cartridge 12 clockwise in FIG. (In the opposite direction). As shown in FIGS. 1 and 4, the film cartridge 12
, The rotation center 28A of the capstan 28 is farther than the rotation center 16A of the take-up reel 16 (the rotation center 28A of the capstan 28 is on the left side of the rotation center 16A of the take-up reel 16 in FIG. 1). Capstan 28
Is arranged, and the film winding angle around the capstan 28 is increased, so that the pressing force of the pinch roller 30 is small,
Sufficient conveying force can be obtained. Therefore, energy loss is small and power saving can be achieved.

The photo film 44 is a capstan 2
8 is curved in the same direction as the curl of the film along the peripheral surface of the film 8 and is guided to the take-up reel 16.
4 is not excessively bent, so that there is an advantage that damage to the film is small. In the example shown in FIGS. 1 and 4, the film wrap angle around the capstan 28 is about 120 degrees, but the film wrap angle is
Can be changed depending on the outer diameter of the reel, the positional relationship with the take-up reel 16, and the like. The greater the winding angle, the greater the transfer force. However, the outer diameter of the capstan 28 and the take-up reel 16 are adjusted so that the film winding angle around the capstan 28 is 60 degrees or more.
It is desirable to select the positional relationship between

[0030]

As described above, according to the film transport apparatus of the present invention, the capstan is positioned so that the rotation center of the capstan is farther than the rotation center of the take-up reel when viewed from the film supply unit. With the arrangement, the winding angle of the film around the capstan can be increased without increasing the size of the apparatus. Thereby, even if the pressing force of the pinch roller is relatively small, a sufficient conveying force can be obtained, and power saving can be achieved.

Further, since the film path can be formed in the same direction as the curl of the film without giving excessive bending to the film, there is an advantage that the film is less damaged. Further, according to another aspect of the present invention, a magnetic head is disposed between the film supply unit and the capstan, and the rotation center of the capstan is disposed closer to the magnetic head than the film contact surface of the magnetic head. As a result, the film sent from the film cartridge reaches the capstan with the magnetic head wound around it, and the winding angle of the film around the magnetic head can be increased. Therefore, the magnetic head reliably acts on the magnetic recording layer of the film, and errors in reading or writing magnetic information can be prevented.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a film scanner to which a film transport device according to the present invention is applied.

FIG. 2 is a plan view showing an example of a photo film.

FIG. 3 is a schematic plan view showing the configuration of a film transport device incorporated in the film scanner shown in FIG.

FIG. 4 is a side view showing a film transport path of the film scanner shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Film scanner 12 ... Film cartridge 12A ... Spool 14 ... Film supply part 16 ... Take-up reel 28 ... Capstan 30 ... Pinch roller 44 ... Photo film 56 ... Reproduction head 58 ... Recording head 70 ... Film drive motor

Claims (3)

[Claims] 1. A film supply unit in which a film cartridge is loaded, a take-up reel for winding up a film supplied from the film cartridge loaded in the film supply unit, and a pinch for driving the film by driving force of a motor. And a capstan for conveying the film in a feed direction or a rewinding direction by sandwiching the film with a roller, wherein the rotation center of the capstan is set so as to increase the winding angle of the film around the capstan. A film transport device, wherein the film transport device is located farther from the film supply section than the center of rotation of a take-up reel. 2. A magnetic head in contact with a magnetic recording layer formed on the film is provided between the film supply unit and the capstan, so as to increase a winding angle of the film around the magnetic head. 2. The film transport apparatus according to claim 1, wherein the rotation center of the capstan is disposed at a position closer to the magnetic head than a film contact surface of the magnetic head. 3. The film transport apparatus according to claim 1, wherein a direction of winding the film around the capstan and the take-up reel coincides with a curling direction of the film.